Optics: measuring and testing – By configuration comparison – With photosensitive film or plate
Patent
1992-04-08
1994-02-22
Rosenberger, Richard A.
Optics: measuring and testing
By configuration comparison
With photosensitive film or plate
G01B 1106
Patent
active
052892654
ABSTRACT:
A side surface of a coated optical fiber is irradiated with parallel light, and a light beam reflected by an outer surface of a resin portion to a particular direction and a light beam reflected by a boundary surface between the resin portion and a glass portion to a direction in parallel with the particular direction are selectively detected by an image sensor using a condenser lens and a pinhole member. A distance d.sub.2 between the surface reflection light beam and the boundary reflection light beam and a distance d.sub.1 between incident light beams corresponding to those reflection light beams are measured. A coating state is estimated based on the distances d.sub.1 and d.sub.2 thus measured.
REFERENCES:
patent: 2998745 (1961-09-01), McClellan
patent: 3307446 (1967-03-01), Rottmann
patent: 3807870 (1974-04-01), Kalman
patent: 4822171 (1989-04-01), Brand et al.
Inoue Akira
Kobayashi Yuji
Shinoki Shuji
Rosenberger Richard A.
Sumitomo Electric Industries Ltd.
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